CN110465177A - Red mud Comprehensive utilization method - Google Patents

Red mud Comprehensive utilization method Download PDF

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Publication number
CN110465177A
CN110465177A CN201910930247.6A CN201910930247A CN110465177A CN 110465177 A CN110465177 A CN 110465177A CN 201910930247 A CN201910930247 A CN 201910930247A CN 110465177 A CN110465177 A CN 110465177A
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China
Prior art keywords
red mud
slurry
burning brick
water base
parts
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CN110465177B (en
Inventor
罗丹
刘志华
范振兴
蒋妮娜
李紫龙
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National Electric Investment Group Yuanda Environmental Protection Engineering Co ltd
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State Electric Investment Group Far Environmental Protection Engineering Co Ltd Chongqing Science And Technology Branch
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/80—Semi-solid phase processes, i.e. by using slurries
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/062—Purification products of smoke, fume or exhaust-gases
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/602—Oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/604—Hydroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

The invention proposes a kind of red mud Comprehensive utilization methods.Specifically, the purposes for using red mud as the fume desulphurization method of fume desulfurizing agent and red mud as fume desulfurizing agent is proposed.Further it is proposed that using the non-burning brick preparation method of dealkalize red mud obtained after desulfurization and non-burning brick.The present invention provides the new ways of red mud harmless processing and resource utilization.

Description

Red mud Comprehensive utilization method
Technical field
The present invention relates to red mud process fields, in particular to red mud Comprehensive utilization method, more particularly, to one kind Fume desulphurization method, the purposes of red mud and a kind of non-burning brick preparation method and non-burning brick.
Background technique
Red mud is that aluminium industry extracts the pollution waste residue being discharged when aluminium oxide.Because of the grade of ore, production method, technology water Flat and different, the every 1 ton of aluminium oxide of production of average will be attached to 1 to 2 ton of red mud of output simultaneously.According to 2017 end of the year recent statistics numbers According to display, China's red mud has added up about 500,000,000 tons of volume of cargo in storage, and the annual still newly-increased tens million of tons of discharge.However, the comprehensive benefit of red mud It is only 4% with rate, target of the red mud comprehensive utilization ratio proposed far below Ministry of Industry and Information and the Department of Science and Technology 2010 up to 20%.With aluminium The expansion of industry and the reduction of aluminum ore grade, the yield of red mud can still increase year by year.
Red mud pilling had not only occupied a large amount of land resource, but also easily caused environment influence and security risk, will also generate 20 To 40 yuan/ton of stockpiling cost.In addition, " People's Republic of China's environmental protection tax law " was implemented on January 1st, 2018, smelting Refining slag (including red mud) will be collected with 25 yuan of the amount of tax to be paid per ton, further increase enterprise's pressure.Therefore, it realizes and counts by all kinds of means, greatly The red mud harmless processing of amount and application technology as the second resource are one of the key technologies of aluminium oxide industry development.
Processing and utilization for red mud, there are still huge development needs.
Summary of the invention
In one aspect, the present invention provides a kind of fume desulphurization method, which is characterized in that uses red mud as flue gas desulfurization Agent.
Optionally, which comprises
Make water base red mud slurry and smoke contacts and react, the step of by sulfur dioxide removal in the flue gas.
Optionally, make the water base red mud slurry under an oxygen-containing atmosphere with the smoke contacts.
Optionally, the solid content of the water base red mud slurry is 10%-20%.
Optionally, the pH of the water base red mud slurry is 8-11.
Optionally, the method also includes:
After the water base red mud slurry and the smoke contacts, the water base red mud slurry is recycled and is dehydrated, to obtain Obtain dealkalize red mud.
On the other hand, the present invention provides purposes of the red mud as fume desulfurizing agent.
In yet another aspect, the present invention provides a kind of non-burning brick preparation method, which is characterized in that the method uses above-mentioned Dealkalize red mud is as non-burning brick raw material.
Optionally, which comprises
Prepare mixed slurry, the mixed slurry include: above-mentioned dealkalize red mud, flyash, gypsum, activity cause material and Water；
The mixed slurry is formed and dried, to obtain adobe；And
Steam press maintenance is carried out to the adobe, it is non-burning brick to obtain.
Optionally,
Include: in the mixed slurry
The dealkalize red mud 50-75 parts by weight；
Flyash 15-25 parts by weight；
Gypsum 8-15 parts by weight；With
Activity causes 5-12 parts of material.
Specific embodiment
In order to realize that the integrated treatment of a large amount of red muds by all kinds of means utilizes, the present invention is proposed.
Red mud has high alkalinity feature, and ingredient includes alkaline chemical combination largely containing elements such as sodium, calcium, iron and aluminium Object causes red mud to belong to strong basicity nocuousness waste residue.The direct stockpiling of strong basicity waste residue can damage heap dis environment.
Inventors have found that the alkaline components of red mud can be used as effectively sulphur ingredient admittedly, and discovery red mud is suitble to use in turn In flue gas desulfurization technique.In particular, realizing red mud dealkalize itself while by flue gas desulfurization, its alkalinity is greatly reduced.This Sample by using red mud as fume desulfurizing agent, while realizing the resource utilization and harmless treatment of red mud.Inventor is into one Step discovery, the red mud after dealkalize can also be non-burning brick applied to preparing, to further realize the comprehensive utilization of resources of red mud.
On the one hand, the present invention provides a kind of fume desulphurization method, which is characterized in that uses red mud as flue gas desulfurization Agent.
Flue gas comes from a variety of industrial departments such as boiler, industrial furnace, thermal power plant, coking, cement plant, electrolytic aluminium extensively.Sulphur Oxide be one of main environmental contaminants in flue gas.The purpose of flue gas desulfurization is mainly the titanium dioxide removed in flue gas Sulphur.In the past, flue gas desulfurization was needed using lime stone.
It was found by the inventors of the present invention that can react with the sulfur dioxide in flue gas in the red mud of alkalinity there are a variety of thus By the substance that sulfur dioxide is fixed, and then find that red mud can be used as fume desulfurizing agent, or be solid sulfur materials.
The primary chemical variation that ingredient and sulfur dioxide in red mud occur includes but is not limited to:
NaOH+SO2→Na2SO3+H2O (1)
Ca(OH)2+SO2→CaSO3↓+H2O (2)
Al(OH)3+SO2→Al2(SO3)3+H2O (3)
Fe(OH)3+SO2→Fe2(SO3)3+H2O (4)
SO3 2-+O2→SO4 2- (5)
CaSO3+O2→CaSO4↓ (6)
Alkaline components in red mud, including various oxides and hydroxide, react with sulfur dioxide, generate sulfurous acid Salt.Sulphite, which can also further be reacted with oxygen, generates sulfate.
By reaction, the sulfur dioxide in flue gas is absorbed by red mud, while neutralization reaction consumes the alkalinity in red mud Substance, and the alkalinity of red mud is substantially reduced.
Using red mud as the concrete mode of fume desulfurizing agent is to make red mud and smoke contacts and react.It can be used any Suitable mode makes red mud and smoke contacts.A kind of embodiment of fume desulphurization method of the invention be include making water base red mud Slurries and smoke contacts simultaneously react, the step of by sulfur dioxide removal in the flue gas.The form benefit of water base red mud slurry Disperse in red mud to be come into full contact with flue gas, and water contained therein can be used for dissolution and sulfur dioxide absorption.Water Base red mud slurry is by the way that red mud to be dispersed in the slurries formed in water-based fluid.
Making a kind of exemplary approach of water base red mud slurry and smoke contacts is to spray slurries from the top down in absorption tower Leaching, and at the same time moving flue gas from bottom to top, so that the two be made to come into full contact with.Aforesaid way can pass through conventional absorption tower It carries out.
Water base red mud slurry preferably carries out under an oxygen-containing atmosphere with smoke contacts.As described above, the presence of oxygen can incite somebody to action Inferior sulfate radical is oxidized to sulfate radical, so that sulphur be made more to be fixed.
The solid content of water base red mud slurry of the invention is preferably 10%-20%.The advantages of this solid content range is can To obtain the relatively good water base red mud slurry of mobility, dispersibility and concentration.
Preferably, the pH of the water base red mud slurry is 8-11.Such alkaline range is conducive to the abundant of sulfur dioxide It absorbs.
The solid content and pH of water base red mud slurry can be adjusted by the water of addition.
The time and concrete mode of water base red mud slurry and smoke contacts can be adjusted according to the actual situation, thus effectively The sulphur in flue gas is removed, and eliminates the alkalinity of red mud as much as possible.
After method of the invention can also be included in water base red mud slurry and the smoke contacts, water base red mud slurry is returned It receives and is dehydrated, to obtain dealkalize red mud.It is reduced with the water base red mud slurry neutral and alkali after smoke contacts, and wherein generates Asia Sulfate and sulfuric acid salt component.It can carry out recycling sharp dehydration using conventional method.Relative to the red mud of non-dealkalize, dealkalize is red Even if mud is directly stored up, also smaller to environmental hazard.Moreover, dealkalize red mud can be further used for other purposes, such as prepare It is non-burning brick.
Purposes the invention proposes red mud as fume desulfurizing agent.Red mud is red mud as the purposes of fume desulfurizing agent New application has found new approach for the resource utilization of red mud.In addition, the red mud alkalinity after desulfurization reduces, it is no longer highly basic Property waste residue, is good for the environment, and can be also used for preparing non-burning brick, and resource utilization is furthermore achieved.
The present invention provides a kind of non-burning brick preparation method, which is characterized in that the method use above-mentioned dealkalize red mud as Non-burning brick raw material.Non-burning brick is the brick that can be manufactured without high-temperature calcination.It is non-burning brick to have the advantages that energy conservation and environmental protection.After dealkalize Main component in red mud is calcium sulfate, silicate and part ferro-aluminum oxide, is suitable for non-burning brick raw material.It is red by dealkalize It is non-burning brick made from mud to meet non-burning brick national standard.
In one embodiment, the non-burning brick preparation method includes:
Prepare mixed slurry, the mixed slurry include: above-mentioned dealkalize red mud, flyash, gypsum, activity cause material and Water；
The mixed slurry is formed and dried, to obtain adobe；And
Steam press maintenance is carried out to the adobe, it is non-burning brick to obtain.
In addition to dealkalize red mud, also cause material using flyash, gypsum, activity to prepare for non-burning brick mixed slurry. The firing step is not necessarily in non-burning brick preparation process.By can be obtained the brick bat drying suppressed and steam press maintenance unburned Brick.
Preferably, include: in mixed slurry
The dealkalize red mud 50-75 parts by weight；
Flyash 15-25 parts by weight；
Gypsum 8-15 parts by weight；With
Activity causes 5-12 parts of material.
The advantages of said ratio is to keep non-burning brick structure finer and close, and anti-pressure ability is higher.
It further include suitable water in mixed slurry for green brick forming.
Above-mentioned mixed slurry is merely exemplary non-burning brick preparation method.It can be using other compositions together with dealkalize red mud It is prepared as raw material non-burning brick.
Flue gas dealkalize of the invention and non-burning brick preparation method can be carried out by various feasible modes.Implement at one In scheme, from alumina industry technique end extraction red mud slurry, slurry tank is arrived for slurry after progress primary filtration.By former red mud slurry Water is added, is adjusted to solid content 10 to 20%.Then, desulfurization process is carried out in absorption tower.Serum recycle flow is adjusted, liquid is kept Gas ratio is 7 to 20L/m3.Slurries enter absorption tower and are sprayed by nozzle, and slurries are carried out with smoke contacts from top to bottom in absorption tower Desulphurization reaction, then it flow to absorb the bottom of the tower.Air is blasted by oxidation fan in absorb the bottom of the tower, oxygen gas component is by desulfurization in air Sulphite in rear slurry further aoxidizes, and is converted into the sulfate with stability.Slurries after the completion of desulfurization are by blowdown Mouth discharge is dehydrated, and is obtained dealkalize red mud as non-burning brick and is prepared raw material.Thereafter, the red mud slag after dealkalize is applied to preparation Non-burning brick, components by weight percent is as follows: 50 to 75 parts of dealkalize red mud of dehydration, 15 to 25 parts of flyash, 8 to 15 parts of gypsum, activity is drawn 5 to 12 parts of material issuance.Red mud, flyash, gypsum, activity are added according to the above ratio and causes material, water is added and is thoroughly mixed uniformly, 20 to 25min are persistently stirred again, guarantee to be sufficiently mixed.Mixture obtained is delivered in compacting grinding tool, extrusion forming is passed through For adobe.By adobe, adobe stands drying in 15 to 20 hours under field conditions (factors), is re-fed into steam pressure reaction kettle in 50 to 150 DEG C, Steam press maintenance 1.5 to 3 hours under 0.5-1MPa pressure, is made non-burning brick finished product.
The present invention proposes overbasic red mud being applied to flue gas desulfurization, while realizing red mud dealkalization.Further according in red mud It is containing compounds such as silicon, aluminium, iron, calcium, the red mud slag after desulfurization is non-burning brick applied to preparing, realize the comprehensive resource of red mud It utilizes.
By the following examples, the present invention is further illustrated.
Embodiment 1:
The red mud slurry being discharged to aluminium oxide preparation process is added water and uniformly mixes, and the control of red mud slurry solid content is existed 10%, pH are about 11 or so.In absorption tower, red mud slurry is sprayed from tower top, and be passed through flue gas upwards from tower bottom.In flue gas SO2Initial concentration is 3500mg/L.Slurry flow is adjusted, holding liquid-gas ratio is 10L/m3.By to sulfur dioxide in desulfidation tail gas The on-line monitoring and record of concentration, the concentration of sulfur dioxide in flue gas is 110mg/L after absorption, calculates going for sulfur dioxide accordingly Except rate is 96.8%.
Used red mud is carried out dehydrating, for carrying out non-burning brick preparation.Its components by weight percent is as follows: dehydration dealkalize 50 parts of red mud, 25 parts of flyash, 15 parts of gypsum, activity causes 5 parts of material.Red mud, flyash, gypsum, work are added according to the above ratio Property cause material, water, which is added, to be thoroughly mixed uniformly, then persistently stirs 20min.Mixture obtained is delivered to compacting grinding tool It is interior, it is adobe by extrusion forming.Adobe is dried 15 hours under field conditions (factors), is re-fed into steam pressure reaction kettle, at 60 DEG C, Steam press maintenance 1.8 hours under 0.5MPa pressure, are made non-burning brick finished product.After tested, national standard is complied fully with.
Embodiment 2:
The red mud slurry being discharged to aluminium oxide preparation process is added water and uniformly mixes, and the control of red mud slurry solid content is existed 15%, pH are about 10 or so.In absorption tower, red mud slurry is sprayed from tower top, and be passed through flue gas upwards from tower bottom.In flue gas SO2Initial concentration is 3500mg/L.Slurry flow is adjusted, holding liquid-gas ratio is 15L/m3.By to sulfur dioxide in desulfidation tail gas The on-line monitoring and record of concentration, the concentration of sulfur dioxide in flue gas is 98mg/L after absorption, calculates going for sulfur dioxide accordingly Except rate is 97.2%.Used red mud is carried out dehydrating, for carrying out non-burning brick preparation.Its components by weight percent is as follows: de- 60 parts of water dealkalize red mud, 22 parts of flyash, 12 parts of gypsum, activity causes 7 parts of material.Red mud, flyash, stone are added according to the above ratio Cream, activity cause material, and water is added and is thoroughly mixed uniformly, then persistently stirs 23min.Mixture obtained is delivered to compacting It is adobe by extrusion forming in grinding tool.Adobe is dried 17 hours under field conditions (factors), steam pressure reaction kettle is re-fed into, 90 DEG C, steam press maintenance 2 hours under 0.7MPa pressure are made and comply fully with the non-burning brick finished product of national standard.
Embodiment 3:
The red mud slurry being discharged to aluminium oxide preparation process is added water and uniformly mixes, and the control of red mud slurry solid content is existed 18%, pH are about 9 or so.In absorption tower, red mud slurry is sprayed from tower top, and be passed through flue gas upwards from tower bottom.In flue gas SO2Initial concentration is 3500mg/L.Slurry flow is adjusted, holding liquid-gas ratio is 18L/m3.By to sulfur dioxide in desulfidation tail gas The on-line monitoring and record of concentration, the concentration of sulfur dioxide in flue gas is 90mg/L after absorption, calculates going for sulfur dioxide accordingly Except rate is 97.4%.Used red mud is carried out dehydrating, for carrying out non-burning brick preparation.Its components by weight percent is as follows: de- 70 parts of water dealkalize red mud, 19 parts of flyash, 10 parts of gypsum, activity causes 10 parts of material.According to the above ratio be added red mud, flyash, Gypsum, activity cause material, and water is added and is thoroughly mixed uniformly, then persistently stirs 22min.Mixture obtained is delivered to pressure It is adobe by extrusion forming in grinding tool processed.Adobe is dried 18 hours under field conditions (factors), is re-fed into steam pressure reaction kettle, In 120 DEG C, steam press maintenance 2 hours under 0.9MPa pressure, non-burning brick finished product is made.After tested, national standard is complied fully with.
Embodiment 4:
The red mud slurry being discharged to aluminium oxide preparation process is added water and uniformly mixes, and the control of red mud slurry solid content is existed 20%, pH are about 8 or so.In absorption tower, red mud slurry is sprayed from tower top, and be passed through flue gas upwards from tower bottom.In flue gas SO2Initial concentration is 3500mg/L.Slurry flow is adjusted, holding liquid-gas ratio is 20L/m3.By to sulfur dioxide in desulfidation tail gas The on-line monitoring and record of concentration, the concentration of sulfur dioxide in flue gas is 70mg/L after absorption, calculates going for sulfur dioxide accordingly Except rate is 98.0%.Used red mud is carried out dehydrating, for carrying out non-burning brick preparation.Its components by weight percent is as follows: de- 75 parts of water dealkalize red mud, 15 parts of flyash, 8 parts of gypsum, activity causes 12 parts of material.Red mud, flyash, stone are added according to the above ratio Cream, activity cause material, and water is added and is thoroughly mixed uniformly, then persistently stirs 25min.Mixture obtained is delivered to compacting It is adobe by extrusion forming in grinding tool.Adobe is dried 20 hours under field conditions (factors), steam pressure reaction kettle is re-fed into, 150 DEG C, non-burning brick finished product is made in steam press maintenance 3 hours under 1MPa pressure.After tested, national standard is complied fully with.
As described above, the present invention provides the new ways of red mud harmless processing and resource utilization.
Obviously, those skilled in the art can carry out various modification and variations without departing from this hair to the embodiment of the present invention Bright spirit and scope.In this way, if these modifications and changes of the present invention belongs to the claims in the present invention and its equivalent technologies Within the scope of, then the present invention is also intended to include these modifications and variations.

Claims (11)

1. a kind of fume desulphurization method, which is characterized in that use red mud as fume desulfurizing agent.
2. the method according to claim 1, wherein the described method includes:
Make water base red mud slurry and smoke contacts and react, the step of by sulfur dioxide removal in the flue gas.
3. according to the method described in claim 2, it is characterized in that,
Make the water base red mud slurry under an oxygen-containing atmosphere with the smoke contacts.
4. according to the method described in claim 2, it is characterized in that,
The solid content of the water base red mud slurry is 10%-20%.
5. according to the method described in claim 2, it is characterized in that,
The pH of the water base red mud slurry is 8-11.
6. the method according to claim 1, wherein the method also includes:
After the water base red mud slurry and the smoke contacts, the water base red mud slurry is recycled and is dehydrated, to be taken off Alkali red mud.
7. purposes of the red mud as fume desulfurizing agent.
8. a kind of non-burning brick preparation method, which is characterized in that the method uses dealkalize red mud described in claim 5 as exempting from Fire brick raw material.
9. non-burning brick preparation method according to claim 8, which is characterized in that the described method includes:
Mixed slurry is prepared, the mixed slurry includes: dealkalize red mud according to claim 6, flyash, gypsum, work Property cause material and water；
The mixed slurry is formed and dried, to obtain adobe；And
Steam press maintenance is carried out to the adobe, it is non-burning brick to obtain.
10. non-burning brick preparation method according to claim 9, which is characterized in that
Include: in the mixed slurry
The dealkalize red mud 50-75 parts by weight；
Flyash 15-25 parts by weight；
Gypsum 8-15 parts by weight；With
Activity causes 5-12 parts of material.
11. a kind of method according to claim 11 preparation is non-burning brick.
CN201910930247.6A 2019-09-27 2019-09-27 Comprehensive utilization and treatment method for red mud Active CN110465177B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112062534A (en) * 2020-08-19 2020-12-11 安阳贝利泰陶瓷有限公司 Comprehensive utilization of flue gas with red mud as main raw material and preparation process of aerated concrete product
CN113082957A (en) * 2021-03-29 2021-07-09 内蒙古工业大学 Industrial flue gas sulfur dioxide removing agent and preparation method thereof
CN114100360A (en) * 2021-11-15 2022-03-01 中国铝业股份有限公司 Desulfurizing agent and preparation method thereof

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